671020 has 24 divisors (see below), whose sum is σ = 1610784. Its totient is φ = 230016.

The previous prime is 671017. The next prime is 671029. The reversal of 671020 is 20176.

671020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 670985 and 671003.

It is not an unprimeable number, because it can be changed into a prime (671029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (67116).

2⁶⁷¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

671020 is an abundant number, since it is smaller than the sum of its proper divisors (939764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671020 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (671019) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (4809).

671020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 671020 is about 819.1581043974. The cubic root of 671020 is about 87.5477834247.

Adding to 671020 its reverse (20176), we get a palindrome (691196).

The spelling of 671020 in words is "six hundred seventy-one thousand, twenty".